Re: [Boost-Users] MacOS X MSL Mach-O Problem with Threads

From: John Maddock (john_maddock_at_[hidden])
Date: 2002-12-18 07:28:55

> This seems to be causing all sorts of compiler errors.  Probably due to
the
> fact that, even though some of the posix headers are being included, I am
> using the MSL headers rather than the BSD headers, and my understanding is
> that none of that posix stuff will actually work until I eject the MSL in
> favor of the Unix C headers, which I am not prepared to do right now.
>
> That and the fact that since I am using Carbon, TARGET_CARBON is also
true,
> therefore BOOST_HAS_MPTASKS is getting set to true.
>
> So anyway ... BOOST_HAS_PTHREADS and BOOST_HAS_MPTASKS are both getting
> defined.
>
> I would like to be able to control whether BOOST_HAS_PTHREADS gets
defined,
> because I am actually wanting to use the MP libraries instead, despite
> _POSIX_THREADS being defined.
>
> It looks like how you handled this same problem with Windows was by adding
a
> !defined(BOOST_HAS_WINTHREADS) to the condition as follows:
>
> #     if defined(_POSIX_THREADS) && (_POSIX_THREADS+0 >= 0) &&
> !defined(BOOST_HAS_WINTHREADS)
> #        define BOOST_HAS_PTHREADS
> #     endif
>
> One solution would be to add an additional check for MP Tasks as follows:
>
> #     if defined(_POSIX_THREADS) && (_POSIX_THREADS+0 >= 0) &&
> !defined(BOOST_HAS_WINTHREADS) && !defined(BOOST_HAS_MPTASKS)
> #        define BOOST_HAS_PTHREADS
> #     endif

OK, I've changed the check in posix_features.hpp to check for
BOOST_HAS_MPTASKS, and in macos.hpp I've changed the code to check for
TARGET_CARBON before including posix_features.hpp.  Thanks for the report.

Regards,

John Maddock
http://ourworld.compuserve.com/homepages/john_maddock/index.htm